[Intel-gfx] [PATCH RFC] drm/i915: reduce cursor size for GEN5 hardware

[Maarten Lankhorst]

Op 31-01-17 om 09:09 schreef Uwe Kleine-König:
> From: Chris Wilson <chris at chris-wilson.co.uk>
>
> As the introduced comment admits this is clearly a workaround, but for
> me this is the only known way to make my Lenovo X201 work without
> flickering and crashing.
>
> Signed-off-by: Uwe Kleine-König <uwe at kleine-koenig.org>
> [uwe: added changelog, comment and restrict to GEN5]
> ---
> Hello,
>
> as I don't like having to compile my own kernel (which has this workaround) I
> suggest to apply this patch until someone with more knowledge than me about
> i915 finds the muse and time to work on this.
>
> If applying this patch means that I will become i915 maintainer, then please
> don't apply; I'm not ready for this :-)
>
> Best regards
> Uwe
Just curious, does this help?

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index ae2c0bb4b2e8..13de4c526ca6 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -1838,7 +1838,7 @@ static uint32_t ilk_compute_cur_wm(const struct intel_crtc_state *cstate,
 	 * this is necessary to avoid flickering.
 	 */
 	int cpp = 4;
-	int width = pstate->base.visible ? pstate->base.crtc_w : 64;
+	int width = 256;
 
 	if (!cstate->base.active)
 		return 0;